Helfer, N. [P:(DE-Juel1)171301] ; Bröder, J. [P:(DE-Juel1)165743] ; Hansen, P. [P:(DE-Juel1)164146] ; Koslowski, H. R. [P:(DE-HGF)0] ; Wortmann, D. [P:(DE-Juel1)131042] ; Linsmeier, Ch. [P:(DE-Juel1)157640] ; Blügel, S. [P:(DE-Juel1)130548]